Improvement in sewing-machines



HUNTER.i Sewing-Machines.

Nor 146,679.

UNITED STATES PATENT OFFICE.

` GEORGE WI. HUNTER, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF ONE-HALF HIS RIGHT TO WILLIAM F. STONE, HENRY M. BAKER, AND JAMES II. VERMILYA, OF SAME PLACE.

IMPROVEMENT IN SEWING-MACHINES.

speication foi-ming part of Letters Patent N0.146,679, dated January 2o, 1874, appnmion mea December 12, 1873.

To all 'whom it may cou-cern:

Be it known that I, GEORG-E IV. HUNTER,

\ of Viashington, in the District of Columbia,

duced through the medium ot' a crank. Fig.

4 is a side elevation, showing the driving-pulley and one extremity or arm of the needlearm or lever, and the cam slot or groove, through the medium of which the desired dif- `ferential motion of the needle-carrying lever is obtained directly from a crank on the driving-pulley. Fig. 5 is a top or plan view ofthe shuttle-race and shuttle-carrier detached. Fig. 6 is an elevation of the beam-plate and presser-foot bar; and Fig. 7 is a section through the axis of the driving-pulley, showing also the feed device.

The object of my invention is to produce a sewing-machine which may be run with great rapidity, as well as ease; and it consists generally in the novel construction and combination of parts, more particularly hereinafter described, whereby but few parts are required.

In the drawings, A represents a plate or metal frame attached to and depending from the under side of the bed-plate B. This frame A is provided with a suitable ledge or means for fastening it to the bed-plate, and is also provided with ears or lugs b b, for supporting the rod upon which the shuttle carrier traverses and is guided. A` groove, a, is made in the top of this frame, which forms a guide for the carrier. The top also forms the shuttlerace. Projecting laterally from this frame is a strong stud or lug, A', which forms the support for, and upon which the driving-pulley C bears. C is the driving-pulley, made with an opening or recess therein, as shown in Fig. 7. This pulley is also provided with a camface upon the inner end, shown in Fig. 2, and with a cam-lip, arranged upon the outside of the cylinder, these cams being for the purpose of operating the feed, and upon the outer end a crank-pin is placed for operating the needle-arm.

The object of making the pulley hollow, or with a recess, as shown, is to obtain as long, a bearing or support as practicable to the pulley-shaft c while bringing the face of the pulley close to the plate or frame A.

The pulley-shaft c is rigidly fixed to the pulley O, and has a crank, d, upon its extremity, which drives the shuttle-carrier.

It is intended to make the driving-pulley of suic-ient weight, so that it will act as the ilywheel of the machine, as well as for driving it.

D represents the shuttle-carrier, having the usual iin gers for clasping the shuttle attached thereto. This carrier is provided with ears g g, about equidistant from the extremities of a cam slot or groove, h. These ears are mounted on the rod e. A projection from the carrier works in the groove a, and thus the carrier is guided and kept in its proper relative position with the other working parts. The cam groove or slot 7b has the effect, in connection with the crank d, to give the shuttle-carrier an intermittent, differential, and reciprocating motion. By this curved or cam slot the shuttle is carried rapidly past the needle while it is at rest, and then comes slowly to a stop. F represents the needle arm or lever, havingits pivot or center of motion at o. The under arm of the lever is marked F', and is provided with` vided with a mortise or slot through its inner extremity, into which one end of a regulatingslide, H, enters. This slideH is inclined, or

and driving mechanism, are so well known that particular description thereof is deemed unnecessary. v Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

vl. The hollow pulley C, provided with the The needlebar andneedle, the beam feed-actuating cams, a crank-pin for operating the needle-arm, and a shaft, c, and crank for actuating the shuttle-carrier, when combined with the long bearing` A projecting.;` within the pulley, all as and for the purposes set forth.

2. The combination of the feed-lever, having the slotted end and the slotted lugs z z, with the tapering stitch-regulator H fitted to such slots, and acting as a stay or guide for the feedlever, as well as a feed-regulator, all substantially as and for the purposes set forth.

GEO. W. HUNTER.

Vitnesscs NV. F. STONE, JAs. H. VERMILYA. 

